99x7+11x37的4种简便算法。五年级的列出具体式子
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99×7+11×37
=11×9×7+11×37
=11×63+11×37
=11×(63+37)
=11×100
=1100
=11×9×7+11×37
=11×63+11×37
=11×(63+37)
=11×100
=1100
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99x7+11x37
=99x7+11x7+11x30
=(99+11)x7+11x30
=770+330
=1100
99x7+11x37
=11(9x7+37)
=11×100
=1100
99x7+11x37
=99x7+1x7+10x7+11x30
=(99+1)x7+10x7+11x30
=700+70+330
=700+400
=1100
99x7+11x37
=99x7+1x7+10x7+1x30+10x30
=(99+1)x7+10x7+1x30+10x30
=700+70+30+300
=700+100+300
=1100
=99x7+11x7+11x30
=(99+11)x7+11x30
=770+330
=1100
99x7+11x37
=11(9x7+37)
=11×100
=1100
99x7+11x37
=99x7+1x7+10x7+11x30
=(99+1)x7+10x7+11x30
=700+70+330
=700+400
=1100
99x7+11x37
=99x7+1x7+10x7+1x30+10x30
=(99+1)x7+10x7+1x30+10x30
=700+70+30+300
=700+100+300
=1100
追问
还有就是0.35x90+3.5 0.25乘以1.25乘以9.6 0.065乘以2500+695乘以0.24+51乘以6.95的简算能说下吗,一块达谢
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